on iOS etc does not exist and svninfo resides in $ROOTSYS.

git-svn-id: http://root.cern.ch/svn/root/trunk@37322 27541ba8-7e3a-0410-8455-c3a389f83636

core/base/src/TROOT.cxx

@@ -1580,6 +1580,10 @@ void TROOT::ReadSvnInfo()
    etc += "\\etc";
 #else
    etc += "/etc";
+#endif
+#if defined(R__MACOSX) && (TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR)
+   // on iOS etc does not exist and svninfo resides in $ROOTSYS
+   etc = gRootDir;
 #endif
    filename = gSystem->ConcatFileName(etc, svninfo);
 #endif